Kage Bunshin Lovin'
Naruto kept thrusting into Naruko, sweat running over his chest and back, dripping off his fore head. Beneath him, his henge'd clone kept gasping, moaning, making the most intense face Naruto had ever seen. 'Her' nails kept scratching his back, leaving deep bloody gauges in the flesh; Naruto was both grateful and pissed that Kyuubi would heal them. Pissed, because they would be great proof to show the other guys that yes, he was a stud, thankyouverymuch.
Grateful, because he knew no-one would ever believe he had gotten laid in Konoha.
Just as he was approaching his limit, his clone let out a deep, throaty moan and climaxed. The feeling of 'her' muscles contracting around his cock pushed Naruto over the edge, and with a roar, he came.
Caught in the throes of orgasm, Naruto made a near fatal error: he dispersed his clone.
The resulting rush of memories made Naruto's brain backfire; his dick twitched as it tried to unload a second load almost immediatly, causing severe pain. His nose exploded, a geyser of blood flying out. Naruto collapsed, his entire body convulsing in both pain and pleasure.
His last thought: Man, am I glad Ero-senin ain't around...
Unknown to Naruto, Jiraiya stood on the roof of the building next door, watching the whole thing. He couldn't help but watch as Naruto dispersed the clone too early and go into convulsions.
But he did have to hand it to the kid: that was one interesting way to masterbate!
I may just have to use this in Icha Icha...